Fire extinguisher



FIG. 1 is a perspective view of a fire extinguisher;

FIG. 2 is a front view thereof, the rear view being a mirror image;

FIG. 3 is a top view thereof;

FIG. 4 is a right-side view thereof, the left-side view being a mirror image; and,

FIG. 5 is a bottom view thereof. 

The ornamental design for a fire extinguisher, as shown and described. 